Electrically-driven fan or blower.



E. 3, MGDUFFEE.

ELEGTRICALLY DRWEN PAN 0R BLOWER.

APPLICATION FILED MAR. 17, 1905.

Patented Apr. 27,1909.

2 SHEETS-SHEET l.

E. J. MGDUF'FEE.

ELEGTRICALLY DRIVEN FAN 0R BLOWER.

APPLICATION FILED MAR.17, 1905.

Patented Apr. 2'?, 1909.

2 SHEETS-SHEET 2.

Fig. 5.

InVS-Dior Witnesses:

UNITED STATES PATENT oEEIoE.

PANY, A CORPORATION OF NEW YORK.

ELEcTRIcALLY-Dirvnn on BLowER.

Patented April 27, 190,9.'

'Application filed H arch 17, 190,5. YSerial No. 250,550.

-To all 'whom it may concern. l

Be it known that I, vEDGARJ. MQDUEFEE, a citizen of the United States, residingat Lynn, in the county of Essex andState of Massachusetts, have invented certain new land useful Improvements in Electrically- Driven Fans oi` Blowers, of which the following is a specilication.

The object of my present invention is to improve the construction of fans or blowers,

particularly fans or blowers driven by electric motors.

Incarrying out my invention, I construct and arrange the parts so that the admission l5 of air to the blower and its discharge therefrom takes place ina highly advantageous manner-Q The construction which I have produced. permits of numerous variations in' the arrangement ofthe tion of the -blower to suit diiierent conditions of service. The .various features of novelty which 'characterize my invention are pointed .out with particularity in the claims annexed to and forminga part of this speciiication. Fora better understanding of my invention,

however', 'reference may .be had to the accom anying drawings and descriptionl in whic i Ifl have illustrated a motor-.driven fan motor constructed in accordance with my invention. I Y

Of the drawings, Figure 1 is a side elevation with parts broken away and in section; Fig. 2 is a perspective View showing details;

and Fig 31s an end elevation with parts' broken `away and in section.

-Referring to the drawings, 1 represents a base member to the upper side of which is secured the field ring 2fof an electric mtor by suitable bolts 3. .To the left-hand end/ of the iield ring 2, as seen in Fig'. 3,.is secured an end member or head li'provided with a b earing box 5 in which one end of the armature shaft 6 of the motor is j ournaled. f The head'4 is secured to the field able bolts 6. A head or end secured 'to thel right-hand end of the eld ring 2 as seen in Fig. 1, by bolts 8. The head member 7 carries a bearing box 9 in which the other end of the armature shaft 6 is journaled.

Ribs or arms 10 projecting substantially yparallel with the armature shaft 6I'ro1n the end member 7 support 'at their outer ends an annular member 1.1.

parts. and the operaring 2 by suit-- ember 7 is' casing 12 which isin the usual form is secured to the annular member 11 by similar bolts EDGAR J. MCDUFFEE, OF LYNN, MASSACHUSETTS, ASSIGN OR .TO '-.GENERAL ELECTRIC COM- aresimilar, have/large openings formed in4 them. The` blower` proper or fan 14 is secured to the end of the shaft 6 which projects into the blower casing through one of the end openings for the purpose. An annu- -lar member 15 is secured to the right-hand end of the blower casing 12 by bolts 16 which are similar and similarly placed to the 13. The; ends of the-casing 12, which I bolts 13.` vThe annulanmember. 15 is provided with a centrally-formed aperture 17. A cylinder, barrel or intake member .18 is secured to theannular member 15 near its inner periphery by bolts 19.

In the construction shown in Fig. 1, a diaphragm or partition 20 is-s'iecured t0 the inner side of the annular member 11 vnear its inner c periphery by screws 2,1. The' diaphragm 20,2 which is dished, projects under the fan blades ofthe blower 14 and is formed with an rangement of parts the air enters theblower casing through the cylindrical extensionj 1S and is discharged through the tangential dis-- vThe direction ofthe airA the blower casing with its tangentialyds-v charge opening 22 may be vangular-ly adjusted about theshaft 6 as anaxis. For instance, in Fig. 3 I have shown in dotted lines the po- \about the shaft 6 as a center and areequally spaced apart. By reason of this arrangement sition assumed by the parts when the casing 12 is given a half turn about the shaft as an axis. Any other desired angular movement which isa multiple of the arc between adj acent bolts 13 may be obtained. As the opposite sides of the casing 12 are exact y alike, by removing the bolts 13 and 16 the casing may be turned end for end', so that when the discharge opening 22 is horizontal at the bottom, as shown in Fig. 3, it will be at the right instead of at the left as at present. If the fan blades are not radial it isusually desirable to change the fan end for end with respect to the motor and reverse the rotation of the motor when the blower casing is turned end for end.

j When it is desired toy take air into the blower casing from the motor side of the The blower or fan blower the outerside of the diaphragm 20 aperture of a diameterjist suflicient to al- .low the passage ofthe shaftJ 6. With this ar- Y may be secured to the inner side of the member 15, as shown in dotted linesin Fig. 1. Suitable holes 23 are formed in the inner side of the member into which the bolts 21 may be secured. The change in osition of the diaphragm 2O allows of the a mission of air into the casing from the motor side, and

prevents admission of air into the casing through the extension 18.

When it is found necessary or desirable to draw air into the motor casing through the motor in order to cool the latter, or for any other purpose, doors 24, closing openings in the end member 4, and doors 25, closing openings formed in the portion of the member 7 within'the arms 10, are removed. At the same time curved cover lates 26 are put in place, as shown in dotted lines in Fig. 1, so that they form a cylindrical casing connecting the outer un erforated portion of the end member 7 with t e inner eriphery ofthe annular member 11.' With) this arrangement it is,l of course, understood that the diaphragm-'20j is placed to close the opening in the annular member 15. The arrangement just described results in a material reduction in thetemperature of the motor by causing y and readily assembled, permits ofv av large the heatjglierated in the operation of the motor to `be carried away. ln some cases it may be desirable to leave off one or both of the cover llates 26 in order that part of the air moved y the fan, may be drawn through the motor, while the rest is drawn in through the spaces between the arms 10.

It will be obvious to those skilled inv the art that the construction herein described and illustrated, while simple, readily made number of variations in arrangement and op eration.

While I have hereinbefore illustrated and described one embodiment of my invention,

it'will be obvious to those skilled in the art What I claim as new and desire to secure by Letters Patent of the United States, is,

1. In combination; an electric motor, a

fan blower. driven thereby, and meansfor casing,`said member being formed 'with an.

o ening through which air may pass tol the b ower casing, and means for closing more or less of said opening.

3. In combination, an electric motor comrising a ield lring and an armature shaft, a

tan mounted on one end of said shaft, a fan casing surrounding said fan, a motor end member provided with a portion or extension to which the fan casing 1s secured, said eX- tension or portion being formed with an opening through which air may pass into .the fan casing, and means for closing moreor less of said opening.

4. In combination, a blower casing, a field ring of an electric motor, anend'member secured to said field ring,` said end member be.- ing formed with o enmgs through which air may pass to the lower Acasing, and means for closing some of said openings. l

5. In combination, an electric motor, a blower casing, and a cylindrical cover4 plate engaging the blower casing and said electric motor, said motor comprising a field ring, an

end` member secured thereto and formed with o enings through which airmay pass to the b ower casing, vand means for closlng some of l said openings. I

In ,witness whereof, I have hereuntowset JOHN A. MoMANUs, Jr.,y HENRY 0.*WEsTENDARP.

au. .a 

